
\begin{table}[!htbp] \centering 
  \caption{Effect of treatment on whether the legalization of marijuana leads to fewer people using more serious drugs, such as heroin and cocaine} 
  \label{tab:mar_fewserious} 
\begin{tabular}{@{\extracolsep{5pt}}lcc} 
\\[-1.8ex]\hline 
\hline \\[-1.8ex] 
 & \multicolumn{2}{c}{\textit{Dependent variable:}} \\ 
\cline{2-3} 
 & Wave 1 & Wave 2 \\ 
\\[-1.8ex] & (1) & (2)\\ 
\hline \\[-1.8ex] 
 Fox & 0.049$^{**}$ & 0.052$^{**}$ \\ 
  & (0.022) & (0.023) \\ 
  & & \\ 
 MSNBC & $-$0.024 & 0.004 \\ 
  & (0.022) & (0.024) \\ 
  & & \\ 
\hline \\[-1.8ex] 
Observations & 1,189 & 1,070 \\ 
R$^{2}$ & 0.009 & 0.006 \\ 
Adjusted R$^{2}$ & 0.008 & 0.004 \\ 
\hline 
\hline \\[-1.8ex] 
\textit{Note:}  & \multicolumn{2}{r}{$^{*}$p$<$0.1; $^{**}$p$<$0.05; $^{***}$p$<$0.01} \\ 
\end{tabular} 
\end{table} 
